These are further extracts from Wikipedia
Today, vibrant Hindu communities remain in Malaysia, Singapore, Thailand, Medan city of Indonesia and the Philippines mainly due to the presence of Indians, such as Tamil people, who migrated from the Indian sub-continent to Southeast Asia in past centuries.
One notably Southeast Asian aspect of Tamil Hinduism is the festival of Thaipusam, while other Hindu religious festivals such as Diwali are also well-observed by Hindus in the region. In Thailand and Cambodia, Thai and Khmer people practised Hindu rituals and traditions along with their Buddhist faith, and Hindu gods such as Brahma are still widely revered.
In Indonesia, it is not only people of Indian descent who practice Hinduism; Hinduism still survives as the major religion in Bali, where native Indonesians, the Balinese people, adheres to Agama Hindu Dharma, a variant of Hinduism derived from ancient Java-Bali Hindu traditions developed in the island for almost two millennia that often incorporates native spiritual elements.
Other than the Balinese, a small enclave of Javanese Hindu minorities are also can be found in Java, such as around Tengger mountain ranges near Bromo and Semeru volcanoes, Karanganyar Regency in Central Java, and near Prambanan, Yogyakarta.
Similarly, Hinduism is also found among the Cham minority in Southern Vietnam and Cambodia: just like the Javanese, the majority of them are Muslims but a minority are Hindu. In other parts of Indonesia, the term Hindu Dharma is often loosely used as umbrella category to identify native spiritual beliefs and indigenous religions such as Hindu Kaharingan professed by Dayak of Kalimantan.
The resurgence of Hinduism in Indonesia is occurring in all parts of the country. In the early 1970s, the Toraja people of Sulawesi were the first to be identified under the umbrella of ‘Hinduism’, followed by the Karo Batak of Sumatra in 1977 and the Ngaju Dayak of Kalimantan in 1980. In an unpublished report in 1999, the National Indonesian Bureau of Statistics admitted that around 100,000 she had officially converted or ‘reconverted’ from Islam to Hinduism over the previous two decades.[6] The Ministry of Religious Affairs, as of 2007 estimates there to be at least 10 million Hindus in Indonesia
The growth of Hinduism has been driven also by the famous Javanese prophesies of Sabdapalon and Jayabaya. Many recent converts to Hinduism had been members of the families of Sukarno’s PNI, and now support Megawati Sukarnoputri. This return to the ‘religion of Majapahit’ (Hinduism) is a matter of nationalist pride.
Next to Indonesian Balinese, today, the Balamon Cham are the only surviving native (non-Indic) Hindus in Southeast Asia. In Vietnam there are roughly 160,000 members of the Cham ethnic minority, majority of them adheres Hinduism while some are Muslims.[8] After centuries being dominated by Kinh (Vietnamese), today there are some effort to revive Cham culture.
RAJA ARASA RATNAM 